Reginald Henderson was born on 1 September 1881 and entered the Royal Navy as a cadet in 1895. The counterfactual places his experienced self in the Third Sea Lord's office from 1892, so his tenure would overlap the beginning of his own historical career. That chronological collision shows why retained knowledge is inseparable from the scenario: the returned admiral remembers the service and wars that his younger self has yet to encounter. These dates turn an abstract time-travel rule into a concrete feature of Henderson's biography.
Notable Point · 53:50-54:25
Henderson overlaps the start of his own naval career
Born in 1881 and entering the Royal Navy as a cadet in 1895, Henderson would serve as Third Sea Lord while his younger self approached the service.